In the maelstrom of criticism surrounding America's unionized public teachers, the woman running the second-largest educator union says time has come to collaborate on public school reform rather than resist.

Randi Weingarten, re-elected this week for a third term as president of the American Federation of Teachers (AFT) with 98 percent of the vote, wants her 1.5 million members to be open to changes that might improve public schools...

"She has said she's open to any reform, under certain conditions, except private school vouchers. She's drawn the line there," said Richard Kahlenberg, a senior fellow at a liberal-leaning think tank, The Century Foundation, and author of "Tough Liberal" a biography of former AFT President Albert Shanker.

"But on every other issue - charter schools, merit pay for teachers - she has said that the AFT is willing to talk. And I think that's the right track to take."